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<?php function isStringOrNumeric($in) { // Return true if $in is either a string or numeric return is_string($in) || is_numeric($in); } class Test{} $a = array( 'one', 2, 'three', new Test()); $b = array_filter($a, 'isStringOrNumeric'); if($b === $a) echo('Success!'); else echo('Fail!');
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Fail!